probability

classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view
|

probability

deeksha
(i) The probability that a certain variety of plant produces a yellow flower is 1/5. If two plants are selected at
random, what is the probability that:
(a) both produces yellow flowers
(b) only one produces a yellow flower
(c) there are no yellow flower
(d) at least one produces a yellow flower.
(ii) If n of these plants are selected, what is the probability that there is at least one yellow flower. Hence, determine the
least number of plants which need to be chosen so that the probability of at least one yellow flower is greater than
0.99.
i could not get the second part of the question.please help